Question

Jane noticed as she was doing her morning run that a 20 m flagpole cast a 25 m shadow. A telephone pole was casting a 35 m shadow. The telephone pole was __? ___ m tall.

Answer 1

The shadow make the object look 1/5 bigger than its actual size.
25*1/5=5
25-5=20
Therefore, for the telephone pole:
35*1/5=7
35-7=28
The telephone pole was 28 m tall.

Hope this helps!

Answer 2

ratio and proportion

actualheight:shadow=20:25=4:5

ok, so if the shadow is 35m then what is actual?

?:35=4:5
?/35=4/5
times 35 both sides
?=140/5
?=28
the telephone pole is 28m tall